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Week 3: Everyday patterns and formulas

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This diagram shows how to generate row 7 of Pascal’s triangle from row 6, by adding adjacent numbers together. For example, 1 + 5 = 6; 5 + 10 = 15, 10 + 10 = 20, and so on. So row 7 becomes 1 6 15 20 15 6 1.

 1.1 Pascal’s triangle